Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Ceramic Transactions |
| Herausgeber (Verlag) | Wiley-Blackwell |
| Seiten | 105-118 |
| Seitenumfang | 14 |
| Band | 257 |
| ISBN (elektronisch) | 9781119234463 |
| ISBN (Print) | 9781119234449 |
| Publikationsstatus | Veröffentlicht - 31 Mai 2016 |
Abstract
Ammonia-borane, NH3BH3 (= AB) and sodium tetrahydroborate (NaBH4 = SB) can easily be dissolved in sodium aluminate and silicate solutions. Upon mixing they result in immediate gel formation and re-crystallization of AB and SB during drying. In case of AB-G IRabsorption spectra indicate that the geopolymer matrix (= G) consists of mainly sialate units (Si-O-Al-O). Heating experiments to 120, 150 and 300°C show the formation of polyaminoboranes (PAB) and polyiminoborane (PIB). The underlying reactions could be related to hydrogen release in two exothermic peaks observed at around 122°C and 160°C. In the course of further optimizations of the SB content in SB-G the Si/Al ratio of G could slightly increase with increasing the Si/Al ratio between 0.27 and 2.7. The water content of SB-G decreases linearly with the decreasing contribution of the geopolymer matrix. SB-SOD could be crystallized systematically following a hydrothermal soft chemical synthesis technique at 60°C, 80°C and 120°C. The effect of variations in particle and crystallite sizes could be correlated with effective hydrogen release and the water content in the matrix of the SB-SOD.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Allgemeiner Maschinenbau
- Werkstoffwissenschaften (insg.)
- Allgemeine Materialwissenschaften
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Ceramic Transactions. Band 257 Wiley-Blackwell, 2016. S. 105-118.
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Beitrag in Buch/Sammelwerk › Forschung › Peer-Review
}
TY - CHAP
T1 - NH3BH3 and NaBH4 enclosed in geopolymers and zeolites
AU - Rüscher, C. H.
AU - Schomborg, L.
AU - Assi, Z.
AU - Buhl, J. C.
PY - 2016/5/31
Y1 - 2016/5/31
N2 - Ammonia-borane, NH3BH3 (= AB) and sodium tetrahydroborate (NaBH4 = SB) can easily be dissolved in sodium aluminate and silicate solutions. Upon mixing they result in immediate gel formation and re-crystallization of AB and SB during drying. In case of AB-G IRabsorption spectra indicate that the geopolymer matrix (= G) consists of mainly sialate units (Si-O-Al-O). Heating experiments to 120, 150 and 300°C show the formation of polyaminoboranes (PAB) and polyiminoborane (PIB). The underlying reactions could be related to hydrogen release in two exothermic peaks observed at around 122°C and 160°C. In the course of further optimizations of the SB content in SB-G the Si/Al ratio of G could slightly increase with increasing the Si/Al ratio between 0.27 and 2.7. The water content of SB-G decreases linearly with the decreasing contribution of the geopolymer matrix. SB-SOD could be crystallized systematically following a hydrothermal soft chemical synthesis technique at 60°C, 80°C and 120°C. The effect of variations in particle and crystallite sizes could be correlated with effective hydrogen release and the water content in the matrix of the SB-SOD.
AB - Ammonia-borane, NH3BH3 (= AB) and sodium tetrahydroborate (NaBH4 = SB) can easily be dissolved in sodium aluminate and silicate solutions. Upon mixing they result in immediate gel formation and re-crystallization of AB and SB during drying. In case of AB-G IRabsorption spectra indicate that the geopolymer matrix (= G) consists of mainly sialate units (Si-O-Al-O). Heating experiments to 120, 150 and 300°C show the formation of polyaminoboranes (PAB) and polyiminoborane (PIB). The underlying reactions could be related to hydrogen release in two exothermic peaks observed at around 122°C and 160°C. In the course of further optimizations of the SB content in SB-G the Si/Al ratio of G could slightly increase with increasing the Si/Al ratio between 0.27 and 2.7. The water content of SB-G decreases linearly with the decreasing contribution of the geopolymer matrix. SB-SOD could be crystallized systematically following a hydrothermal soft chemical synthesis technique at 60°C, 80°C and 120°C. The effect of variations in particle and crystallite sizes could be correlated with effective hydrogen release and the water content in the matrix of the SB-SOD.
KW - Gel formation
KW - Geopolymer matrix
KW - Hydrogen
KW - Polyaminoboranes
KW - Polyiminoborane
KW - Re-crystallization
UR - http://www.scopus.com/inward/record.url?scp=85019868473&partnerID=8YFLogxK
U2 - 10.1002/9781119234463.ch10
DO - 10.1002/9781119234463.ch10
M3 - Contribution to book/anthology
AN - SCOPUS:85019868473
SN - 9781119234449
VL - 257
SP - 105
EP - 118
BT - Ceramic Transactions
PB - Wiley-Blackwell
ER -